President Vladimir Putin dramatically escalated East-West tensions by ordering Russian nuclear forces put on high alert, but the explosions and gunfire that have disrupted life since the start of the invasion appeared to subside around Ukraine's capital overnight as the Kremlin's military...

Russia launched a full-scale invasion of Ukraine on Thursday, unleashing airstrikes on cities and military bases and sending in troops and tanks from three sides in an attack that could rewrite the global post-Cold War security order. Ukraine’s government pleaded for help as civilians piled...

Fears of a new war in Europe resurged Thursday as U.S. President Joe Biden warned that Russia could invade Ukraine within days, and violence spiked in a long-running standoff in eastern Ukraine that some fear could be the spark for wider conflict. World dignitaries raced for solutions but...

Russia said Wednesday it was returning more troops and weapons to bases, yet another gesture apparently aimed at easing fears it is planning to invade Ukraine, even as the U.S. said the threat of an attack remained. Russia has massed about 150,000 troops east, north and south of Ukraine,...